Question

natural selection and speciation leads to evolution. justify the statement.​

Answer 1

Species is the group of organisms that can produce fertile individuals through natural reproduction. Each species grows in different geographical conditions, their food, habitat, reproductive ability and period is different. Formation is new species and plants is the effect of evolution. Similarly, geographical or reproductive isolation also leads to speciation

Hence, speciation is responsible for evolution

Charles Darwin, depending upon the observations of innumerable species published the theory of natural selection which preaches the survival of the fittest. He says that all organisms compete with each other in a life threatening manner and reproduce prolifically. Only those organisms that adapt to changing environment and sustain, which are fit to live, are selected and the rest perish. This is natural selection.

As it is now evident, natural selection also plays an important role in evolution

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Answer 2

• Natural selection is defined as the change in frequency of some genes in a population, which gives survival advantage to a species.

• Whereas speciation is the development of a new species from pre-existing ones.

• This leads to a sequence of gradual change in the primitive organisms over million of years, to form newer species which are very different from older ones. This is called evolution.